Lamp.



No. 662,165. Patented Nov. 20, 1900. M. & V. B. CAHILL.

L A M P.

{Applicfltion led July 1, v1899.1

(N9 Model.)

me cams wenns co. Hom-mwa, Mmmm o. c.

Urin@ TATES ATENT FFICE.

MORTIMER CAHILL AND VOLNEY B. CAHILL, OF CHICAGO, ILLINOIS.

LAMP.

SPECIFICATION forming part of Letters Patent No. 662,165, dated November20, 1900.

Application led July l, 1899. Serial No. 722,584.` (No model.)

To all whom, t may concern: L designates a piston sliding in the pipebe- Be it known that we, MORTIMER CAHILL tween a partition M and a stopN and havand VOLNEY B.CAHILL,citizens of the United ing its rod Oextended through the partition States of America, residing at Chicago,in the and terminating, in the compartment with 5 county of Cook andState of Illinois, have inwhich the opening e' is found, in an endprovented certain new and useful Improvements vided with a recess P toreceive the correin Lamps, of which the following is a specisponding endof the thumb-screw e2. From fication. this recess a passage leadsaxially entirely oo Onrinvention relates to certain improvethrough therod and piston, and a vlight 1o ments in lamps, pertaining` especiallyto the spring Q reacts against the partition and fount of a lamp, inwhich the fuel is fed to tends to hold the piston against the stop, andthe lamp under slight pressure furnished by thus to keep the end of therod out of contact compressed air. with the thumb-screw. It is thoughtthat the Some of the objects of the invention are to operation of thedevice and its adequacy are i5 insulate the fuel from the heat of thelamp too well known to require discussion.

and to provide means for maintaining an even In the operation of thedevices the fuelpressure upon the fuel regardless of the receptacle isfilled, the valve f is closed, and

amount of the latter in the fluid-reservoir. enough air is forced intothe reservoir to in- 7c The invention is illustrated in the drawsure asupply ample to ill the fuel-receptacle zo ings presented herewith, ofwhichby expansion without too great reduction of Figure l is a sideelevation of a complete its own pressure. Air passes from the reserlamp.Fig. 2 is a central diametricalsection; Voir through the aperture e andinto the re- Fig. 3, a similar section at right angles to Fig. ceptacleB until the pressure in the latter is 2; Fig. 4, a plan of the lamp withthe burner sufcient to close the limiting-valve,and when 25 cutinhorizontal section; and Fig.5 is an axial the valve f is opened thispressure forces fuel section of a certain pipe, seen at E, Fig. 3. fromthe lowest part of the receptacle through In the drawings, A is acompressed-air resthe pipe cand its connections upto the burner. ervoirprovided with a valve .I to permit forc- As the fuel is used thepressure upon it of 8o ingairinto thesame,andBisarelativelysmall coursetends to decrease, but the limiting- 3o fuel-receptacle centrallylocated within the valve acts automatically to admit more air,

reservoir and intended to contain gasolene or and thus the pressure iskept practically conthe like fuel. The receptacle B is suspended stantuntil the fuel is exhausted. in the reservoir by means of pipes C D E,The flame maybe regulatedeither by means each passing through and fixed'to the walls of the valve f or the thumb-screw controlling 3 5 of bothvessels and each serving a purpose the action of the limiting-valve.

beyond fixing the two vessels relatively. The What we claim ispipe C hasan extension c leading to the botl. In a, lamp, the combination with acomtom of the receptacle and has also an upward pressed-air reservoir,of a burner without the 9o extension F containing a valve f and itselfreservoir, aclosed fuel-receptacle located cen- 4o having an extensionG, which, in connection trally in the air-space within the reservoirwith a symmetrically formed and located rod and provided with a passageopening into the II, supports a burner I. The pipe D is prolatter, and atube leading from the interior vided with a closure d and affords apassage of the receptacle to said burner, substantially through whichfuel may be introduced into as set forth.

45 the fuelreceptacle B. The pipe E termi- 2. In a lamp, the combinationwith a comnates at e within the receptacle B and also pressed-airreservoir, of asmaller closed fuelcommunicates at c with the reservoirA, and receptacle located within said reservoir and it contains apressure-regulating device adat some distance from all its Walls andhav- Ioo justable by means of a screw e2 and coming a passage leadingthrough its own Wall 5o monly known in many arts as a reducing into saidreservoir, a limiting-valve in said or limiting valve. The constructionof passage, a fillingtube leading into said rethis device is clearlyshown in Fig. 5, where Aceptacle from without the reservoir, and adelivery-tube leading from the lower portion of the receptacle to apoint without the reservoir.

3. In a lamp, the combination with a conipressed-air reservoir,'of arelatively small closed fuel-receptacle centrally located within thesame and having a passage leading Ithrough its Wall into said reservoir,a limiting-valve in said passage, means for adjusting said valve fromwithout the reservoir, a filling-tube leading from Without the reservoirinto said receptacle, and a fuel-delivery tube leading from thereceptacle to a point without the reservoir.

4. In a lamp, the combination with a compressed-air reservoir, of asmaller closed fuelreceptacle Within the latter and at some distancefrom all its walls, and provided with an opening into the reservoir, alimiting-valve eontrollingsaid opening, and filling and delivery tubesleading from Without the reservoir to the interior of said receptacleand fixed to the Walls of both, whereby the inner vessel is held at somedistance from the walls of the outer one.

In Witness whereof I, the said MORTIMEB CAHILL, have hereunto set myhand at Springfield, in the county of Hampden and State ofMassachusetts, this 26th day of June, A. D.

